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A086207 Sum of rank(M) over all n X n matrices over GF(4). 1
3, 435, 704403, 15823018515, 5272966965638163, 26837910294320000900115, 2117959516569888987677094001683, 2614420107255201240346554326291784252435, 50761384915342243255034590495173254359633089772563, 15560120110421752320376568335982564883819269596340271934585875 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..10.

FORMULA

a(n) = Sum_{r=1..n} r*Product_{j=0..r-1} (q^n-q^j)^2/(q^r-q^j) with q=4.

PROG

(PARI) a(n) = {my(q=4); sum(r=1, n, r*prod(j=0, r-1, (q^n-q^j)^2/(q^r-q^j)))}

CROSSREFS

Cf. A086190, A086098.

Sequence in context: A332143 A277234 A269553 * A326373 A092052 A139999

Adjacent sequences:  A086204 A086205 A086206 * A086208 A086209 A086210

KEYWORD

nonn

AUTHOR

Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 27 2003

EXTENSIONS

a(6)-a(10) from Andrew Howroyd, Jul 08 2018

STATUS

approved

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Last modified October 26 08:00 EDT 2021. Contains 348267 sequences. (Running on oeis4.)